| 摘要 |
A polycentric axis foot and ankle assembly (10) includes an upper bracket (30), a lower bracket (20), a front link movably attaching the front portion (32) of the upper bracket to the front portion of the lower bracket and a rear link movably attaching the rear portion (34) of the upper bracket (30) to the rear portion (34) of the lower bracket. In a preferred embodiment, the front portion of the upper bracket provides a pair of flanges (58, 60) for supporting an upper front shaft (100) and the rear portion of the upper bracket provides a pair of flanges for supporting an upper rear shaft (102). Each of the upper front shaft and upper rear shaft carries a spherical bearing for movable engagement with the front and rear links, respectively. The front portion of the lower bracket carries a pair of flanges for supporting a lower front shaft (90) and the rear portion of the lower bracket carries a pair of flanges for supporting a lower rear shaft (92).
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